use IPC::Run::Simple;
  run("some", "command")
    or die "command failed";

  # better done as
  use IPC::Run::Simple qw(:all);
  run("some", "command")
    or die "badness! $ERR";

##</code><code>##

  use IPC::Run::Simple qw(:Fatal);
  my $exit_value = run(command => [ "some", "command" ],
                       allowed => [ 0, 1, 5 ]);

##</code><code>##

  use IPC::Run::Simple qw(:Fatal);
  my $exit_value = run(command => "some_command",
                       allowed => [ 0, 1, 5 ]);